Three ways a call can enter

Three ways a call can enter · Quiz

Sources and go deeper

Technical requirements PDF. vendor. last checked 2026-10. Fetched for this lab in October 2026. Re-read before you buy hardware or open a firewall.
SIP trunk options chapter. vendor. last checked 2026-10.
RFC 3261. rfc. last checked 2026-10.
RFC 3550, RTP. rfc. last checked 2026-10.
RFC 3551, RTP profile for audio and video. rfc. last checked 2026-10.
ITU-T G.711. standard. last checked 2026-10.
ITU-T E.164, international public telecommunication numbering. standard. last checked 2026-10.